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                [Usaco2004 Mar]Special Serial Numbers 特殊编号                </h1>
                <p>时间限制：10s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：128MB</p>			</div>
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                                <h3>题目描述</h3><p><div><span style="font-size: medium">&nbsp;&nbsp;&nbsp;&nbsp;在约翰的农场上每个新出生的奶牛都有一个N(1&le;N&le;100)位的数字，这些数字是连续的，</span></div>
<div><span style="font-size: medium">这个数字大于任何其他的奶牛，也就是说，数字越大这头牛也就越年轻．&nbsp;&nbsp;&nbsp;&nbsp;每头奶牛都对自己的编号非常感兴趣．奶牛因自己编号中一半以上（一半除外）数字相同而感到自豪。比如23522中，数字2在5个数字中出现了3次，而12342中没有一个数字出现超过半数．那些一半以上数字相同的数叫特殊数，其他的叫普通数．&nbsp;当然，普通的奶牛非常嫉妒特殊的奶牛，过去它们经常欺负特殊奶牛．由于身体的缘故，一头奶牛只能欺负比他小的奶牛．事实上，一头普通奶牛只欺负比他小的特殊奶牛中最大的那头．不幸的是，普通奶牛并不清楚那头应该被他欺负的奶牛到底是谁．给出一头奶牛的编号，确定哪头奶牛应该被他欺负，如果这头奶牛本身是特殊的，输出这头奶牛自己的编号．</span></div></p><hr/><h3>输入格式</h3><p><div><span style="font-size: medium">&nbsp;&nbsp;&nbsp;&nbsp;仅一个数，要欺负人的奶牛编号．</span></div></p><hr/><h3>输出格式</h3><p><div>&nbsp;</div>
<div><span style="font-size: medium">&nbsp;&nbsp;&nbsp;&nbsp;仅一个数，应该被欺负的奶牛编号．</span></div></p><hr/><h3>样例输入</h3><pre>1234</pre><hr/><h3>样例输出</h3><pre>1311

样例说明
    1在1311中出现3次，超过半数．1199不是特殊数，因为1和9均未超过半数．</pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>Orange</p>
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